Saturday, July 27, 2019

802.11ac: A Survival Guide (Free PDF)

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People keep moving. Networks still don’t, but they are being forced—sometimes quite painfully!—to accommodate the motion of users.

Wireless LANs are well established as The Way to Connect to the Network. When I first moved to Silicon Valley in the late 1990s, it was common to hear people talk about how they had run Ethernet through their homes so that every room had a network jack. Friends of mine worked with their home builders to install their own wiring, and occasionally a renovated home’s listing would breathlessly tout network connectivity. (To those who knew the technology, networking was always more than a patch panel installed someplace convenient.)

Today, network wiring no longer has a monopoly on that initial connection to the network edge. From Ethernet, the world has shifted to using wireless LANs, almost exclusively based on the 802.11 family of standards. In the space of a decade, Ethernet has been transformed from the underlying technology that made jokes like “will code for Internet access” possible into a mere support system for the wireless network that everybody attaches to.

1. Introduction to 802.11ac
2. The PHY
3. The MAC
4. Beamforming in 802.11ac
5. 802.11ac Planning

Author Details
"Matthew S. Gast"

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